Pogostemon hispidocalyx C.Y. Wu&Y.C. Huang

YAO, GANG, DENG, YUN-FEI & GE, XUE-JUN, 2015, A Taxonomic Revision Of Pogostemon (Lamiaceae) From China, Phytotaxa 200 (1), pp. 448-450 : 448-450

14. Pogostemon hispidocalyx C.Y. Wu&Y.C. Huang in Wu et al. (1977: 745). Type: — CHINA. Yunnan: Shang-pa Hsien (now Fugong Xian), 2800 m, 10 October 1933, H.T. Tsai 58679 (holotype KUN!, isotypes A!, IBSC!).

Annual herbs, 30–65 cm tall. Stems erect, or procumbent and rooting sometimes at nodes basally, unbranched or a few branched, pubescent, glabrescent. Leaves opposite; petole 0.5–2.5 cm long, strigose; blade ovate-lanceolate to elliptic, 1–6 × 1–3 cm, submembranous, adaxially strigose to subglabrescent, abaxially glabrous or strigose along veins and densely brown glandular, base cuneate to attenuate, margin acutely double serrate, apex acuminate, lateral veins 5–9 pairs on each side of the veins. Spike terminal, unbranched or sometimes with two lateral branches, 3–15 cm × 8–10 mm, blackish or dark brown when dry; peduncle 1–2 cm long, densely pubescent; verticillasters 6–16-flowered; flowers with a pedicel 0.5–1 mm long, and extending to 2–3 mm long in fruit. Bracts and bracteoles linear, 1–2.5 mm long, margin ciliate. Calyx campanulate in flower, 2–2.5 mm long, and turn to urceolate-campanulate in fruit, 2.5–3 mm long, 10-veined, hispid and glandular outside, throat densely white hirsute annulate; teeth 5, subulate, 0.6–1 mm long, about 1/2 or subequal as long as calyx tube, margin ciliate; Corolla pink or purplish, 2.6–3 mm long, exserted from calyx, 2-lipped, upper lip 3-lobed, lobes obtuse at apex, lower lip entire, apex acute. Stamens 4, not exserted; filaments ca. 1.2 mm long, glabrous, inserted at the middle in corolla tube; anther 1-locular, cell apex dehiscent; style ca. 2.3 mm long; stigma bifid, equal, lobes ca. 0.2 mm long. Disc ca. 0.5 mm long. Nutlets 4, ca. 0.8 mm, subglobose, black, shiny.

22 • Phytotaxa 200 (1) © 2015 Magnolia Press

DENG & GE

Distribution and habitat:— The species is restricted to NW Yunnan in China ( Figure 10 ). It grows occasionally in forests, valleys, or beside roads, at 1250–2800 m elevation

Phenology:— Flowering and fruiting from August to December.

Taxonomic notes:— Pogostemon hispidocalyx is similar to P. brachystachyus in habit, the differences between them are discussed under the latter.

The glabrous filaments not exserting from corolla in this species is diferent from all other Pogostemon species in China.

III. Pogostemon subgen. Dysophylla (Blume) Bhatti & Ingrouille ex Gang Yao, Y.F. Deng & X.J. Ge , comb. et stat. nov. Basionym: Dysophylla Blume (1826: 826) . Type: Pogostemon auricularius (L.) Hassk. [= Dysophylla auricularia (L.) Blume]

When Bhatti & Ingrouille (1997: 107) treated Dysophylla as a subgenus of Pogostemon , they did not validate the name Pogostemon subgen. Dysophylla because they did not fully cite the reference of the basionym which is not in agreement with the requirements of Article 41.3 of the ICN ( McNeill et al. 2012). Here we validate the name through full citation of the reference of the basionym.

IIIa. Pogostemon sect. Dysophylla (Blume) Mueller (1865: 200) . Dysophylla Blume (1826: 826) . Dysophylla sect. Eudysophylla Kudô (1929: 46) , nom. inval. Type: Pogostemon auricularius (L.) Hassk. [= Dysophylla auricularia (L.) Blume]

Dysophylla sect. Oppositifoliae Bentham (1833: 157) , nom. inval. Type: Dysophylla auricularia (L.) Blume.

According to Article 22.2 of the ICN ( McNeill et al. 2012), the name Dysophylla sect. Oppositifoliae was not validly published by Bentham (1833) because the original type of Dysophylla , D. auricularia , was included.

Figures

FIGURE 10. Distribution maps of Pogostemon fraternus, P. hispidocalyx, P. auricularius and P. barbatus.